 JNIEXPORT int JNICALL PRE_CDECL initRS(JNIEnv *env, jobject obj, int COM) POST_CDECL;
 JNIEXPORT int JNICALL  PRE_CDECL statusRs(JNIEnv *env, jobject obj, int COM) POST_CDECL;
 JNIEXPORT int JNICALL  PRE_CDECL sendRS(JNIEnv *env, jobject obj, int COM, int sendChar) POST_CDECL;
 JNIEXPORT int JNICALL  PRE_CDECL recvRS(JNIEnv *env, jobject obj, int COM) POST_CDECL;